- Patients must have measurable disease, defined as at least one lesion that can be accurately measured in at least one dimension (longest diameter to be recorded for non-nodal lesions and short axis for nodal lesions) as >= 10 mm with computed tomography (CT) scan, magnetic resonance imaging (MRI), or calipers by clinical exam and >= 15 mm in short axis for nodal lesions; patients must have radiographic evidence of disease progression following the most recent line of treatment